A Tennessee photographer caught a glimpse of a spectacular and rare bird. Knoxville Ornithological Society President Jimmy Tucker told WBIR he heard about a rare yellow cardinal sighting in Roane County. "I was able to get back out to the property to check in on the Yellow Cardinal. He did not disappoint and gave me several good opportunities to photograph. I don’t normally like to photograph birds on a feeder, but with this guy you take what you get. I took a couple new bags of food to the homeowner. Providing different food blends give the birds variety & some help with nesting birds. The homeowner a retired biologist is calling this bird 'Yellow Saffron,'" Tucker wrote on Facebook. Auburn University ornithologist Dr. Geoffrey Hill told WKRG the yellow cardinal has a rare genetic mutation where the DNA has stopped production of red pigment."All animals carry a DNA code, and all animals have mutations. Certain mutations have a dramatic effect on what the organism will look like. This shows that nature is not static. It is a work in progress and is changing," Hill said.Yellow cardinals have dazzled the internet in recent years, with two others being spotted in Georgia and Alabama. See more of Tucker's photography here.

KNOXVILLE, Tenn. —

A Tennessee photographer caught a glimpse of a spectacular and rare bird.

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"I was able to get back out to the property to check in on the Yellow Cardinal. He did not disappoint and gave me several good opportunities to photograph. I don’t normally like to photograph birds on a feeder, but with this guy you take what you get. I took a couple new bags of food to the homeowner. Providing different food blends give the birds variety & some help with nesting birds. The homeowner a retired biologist is calling this bird 'Yellow Saffron,'" Tucker wrote on Facebook.

Auburn University ornithologist Dr. Geoffrey Hill told WKRG the yellow cardinal has a rare genetic mutation where the DNA has stopped production of red pigment.

"All animals carry a DNA code, and all animals have mutations. Certain mutations have a dramatic effect on what the organism will look like. This shows that nature is not static. It is a work in progress and is changing," Hill said.

Yellow cardinals have dazzled the internet in recent years, with two others being spotted in Georgia and Alabama.